Valve.



FTQ

RUSSELL A. MILNE, OF DETROIT, MICHIGAN, ASSIGNOR TO PIGARD-MILNECOMPANY, A COPARTNERSHIP COMPRISING ALBERT C. PICARD AND RUSSELL A.MILNE, BOTH VALVE.

To all whom it may concern:

Be it known that I, RUssnLL A. MILNE, a citizen of the United States,residing at Detroit, in the county of Wayne, State of Michigan, haveinvented certain new and useful Improvements in Valves; and I do declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the characters of reference markedthereon, which form a part of this specification.

This invention relates to valves of the ball type, and consists in theconstruction and arrangement of parts hereinafter set forth and claimed.

The invention has for its object the provision of a simple and eflicientvalve construction in which the arrangement is such as to insure a moreperfect seating of the valve through the provision of means for carryingthe ball of the valve so as to allow it to freely turn as the valve isoperated and successively present a new seating surface and overcome theliability of leakage through wear of the valve seat and ball.

A further object is the provision of a cletachable cage for carrying theball in such manner as torender the ready assembling as well as thedisengagement for replacement of the wearing parts of the valve.

The preferred form of embodiment of the novel features of the presentinvention by which the above objects are attained is illustrated in theaccompanying drawings, in which,

Figure 1 is a side elevation of the valve with its pipe connections,having a portion of the wall of the body of the valve broken away toshow the interior arrangement of the parts embodying my invention, thevalve being shown in its closed position. Fig. 2 is a central verticalsectional view through the valve, showing the parts in the openedposition, the ball and valve stem being shown in elevation. Fig. 3 is aside elevation of the valve stem and cage for carrying the ball, showingthe valve stem disengaged therefrom and indicating by dotted lines theposition of the valve stem when engaged with the cage and its ball. Fig.4 is a plan view of the valve cage.

Referring to the parts of the device by Specification of Letters Patent.

Patented Feb. 29, 1916.

Application filed June 21, 1915. Serial N 0. 35,205.

the characters of reference marked on the several views of the drawings,1 represents a valve case of the ordinary globe valve type, having theusual dividing partition 2 through an opening 3 in which the induct andeduct chambers of the valve communicate, and with which chambers thecirculating pipes 4 and 5, respectively, are connected. Secured withinthe boss 6 of the valve case by screw-threaded engagement is the bonnet7 through which the valve stem 8 passes, and which has screw-threadedengagement as at 9 with said bonnet, by which it is moved vertically toraise and lower the valve through the rotation of the handle 10 on theupper end thereof. The usual stuffing-box 11 embracing said stem hasscrewthreaded engagement with the upper end of the bonnet for effectinga close working fit about the stem. All of the above features are commonin valve construction.

The lower end of the valve stem 8 is provided with an enlarged annularhead 12, in the under face of which is an axial con cavity 13, in whichthe ball 11, forming the plug or closure for the valve opening 3, isadapted to seat, and extending radially from said concavity to theperiphery of said head, upon one side thereof, is a circular depression15 which is slightly less in depth than the depth of the concavity 13,and which corresponds in its arc with the contour of the ball, asclearly shown in Figs. 1 and 2. The ball is held suspended in theconcavity 13 in axial alinement with the valve stem by means of a cage16. This cage comprises a lower ring 17 joined upon opposite sides inconcentric spaced relation with opposite sides of an upper semicircularplate 18 by means of parallel connecting arms 19. The lower ring 17 isformed with a central aperture 20 which is slightly less in diameterthan the diameter of the ball, and which is beveled at its upper inneredge to receive and engage said ball on a line below its center,allowing the ball to extend below the lower face of said ring butpreventing its passage therethrough. The upper or semi-circular plate 18is formed with a central U-shaped aperture 21, the mouth of which opensthrough the plane of the chord of the arc of said plate. The sides ofthe aperture lie astride the stem 8 of the valve with the under face ofthe body of the plate engaging the upper face of the head 1.2 of saidstem. The cage is thus supported loosely, forming a swivel connectionwith the head cf the valve stem, and carries the ball therein looselyretained between the concavity of said head and the lower ring of thevalve cage, wherein it is free to revolve and by which it is movedtoward and from the opening 3 of the valve case, in which it is adaptedto seat and close said opening, as shown in Fig. 1.

The ball is passed into the cage between the upper forward edge of thelower ring 17 and the face forming the chord of the semi-circular plate18. The cage may then be assembled upon the valve stem by placing theradial depression 15 of said stem into registering alinement with theupper arc of the ball and by then passing said.

stem laterally into the U-shaped aperture of the semi-circular platewith the head of the valve stem entering the cage and engaging its upperface with the under face of said plate, as indicated by the dottedposition illustrated in Fig. 3. The cage thus'assembled upon the valvestem, when placed in the valve case in position within the bonnet of thevalve, as shown in Figs. 1, and 2, will be held from disengagement withthe valve stem'through lateral movement by contact with the wall of thevalve bonnet, which is sufliciently larger in diameter thanthediameterof the valve cage to permit of the free movement of the cagetherein as it raises and lowers the ball to open andiclose the passageof the valve through the vertical movement of the valve stem.

\Vhen the valve is closedthrough the rotation of the stem, the ball iscrowded into and seats over the opening of the valve by "the engagementof the concaved end of the valve stem with the upper are of the ball;

as shown in Fig l, thereby eifectinga tight closure of the openmg 'inthe valve-chaniber through the seating of the lower are of the the ballto rotate so as-to change the seating: surface presented to the valvewith each movement of the valve stem, and thus equal-. izing thewearupon the surface, ofthe ball.

and at all times efiecting a morenearlyperfeet closure with the seatthaniis ordinarily afforded.

I claim:

A ball-valve comprising a case having; a

valve seat therein, a valve stem: movablewtoward and from said seat andhaving an en? larged head thereon, in: the i1n 3lenface of which isformed an axial concavity: and a radial depression, a ball forcooperating with said head and seat,. a cage having a' ring forcarryingsaid ball therein, and having'a U-shaped aperture for detachably receiving said valve stem above said head to loosely support saldcagethereon, said head: being adapted to pass'over said ballthrough saidradialv depression and toreceive 'said ball in said axial concavity;

In testimony whereof, I sign thi sped-- fication.

RUSSELL A. M-ILNE;

Copies of this patent may be obtained forfive cents each, byaddressingthe Commissioner of. Patents,

Washington, D. G.

